阅读说明：本技术 抗菌结构及其制造方法 (Antimicrobial structure and method of making same ) 是由 张嘉纮 李士玮 廖釬銂 于 2019-02-22 设计创作，主要内容包括：本发明公开一种抗菌结构及其制造方法,其中抗菌结构包括多个抗菌层以及至少一中间层。多个抗菌层呈堆栈设置,每一抗菌层为一带有抗菌金属的高分子纤维或抗菌金属纤维所形成,至少一中间层设置在多个抗菌层之间。借此,抗菌结构能够应用于各种抗菌性产品,并提供长效而稳定的抗菌效果。(The invention discloses an antibacterial structure and a manufacturing method thereof, wherein the antibacterial structure comprises a plurality of antibacterial layers and at least one middle layer. The antibacterial layers are stacked, each antibacterial layer is formed by high polymer fibers or antibacterial metal fibers with antibacterial metal, and at least one middle layer is arranged among the antibacterial layers. Therefore, the antibacterial structure can be applied to various antibacterial products and provides a long-acting and stable antibacterial effect.)

1. A method of manufacturing an antimicrobial structure, comprising:

(A) providing a composite polymer fiber, and enabling the composite polymer fiber to form a layered structure, wherein an effective amount of antibacterial metal precursors are uniformly distributed on the composite polymer fiber;

(B) reducing the effective amount of the antibacterial metal precursor into antibacterial metal so that the layered structure forms an antibacterial layer;

(C) providing an organic polymer fiber on the antibacterial layer, and enabling the organic polymer fiber to form an intermediate layer; and

(D) repeating steps (A) and (B) or steps (A) to (C).

2. The method of claim 1, wherein the composite polymer fiber comprises a core layer and a surface layer covering the core layer, and the effective amount of the antimicrobial metal precursor is uniformly distributed in the surface layer, wherein step (B) comprises performing plasma treatment on the layered structure to form the composite polymer fiber with the antimicrobial metal in the layered structure into the antimicrobial metal-loaded polymer fiber, wherein the antimicrobial metal-loaded polymer fiber comprises a polymer core and an antimicrobial metal sheath surrounding the polymer core.

3. The method of claim 1, wherein the composite polymer fiber comprises a core layer and a surface layer covering the core layer, and the effective amount of the antimicrobial metal precursor is uniformly distributed in the core layer and the surface layer, wherein step (B) comprises performing plasma treatment on the layered structure to form the composite polymer fiber in the layered structure into the antimicrobial metal fiber.

4. The method of claim 1, wherein step (a) comprises providing the composite polymeric fiber as an electrospun form, and wherein step (C) comprises providing the organic polymeric fiber as an electrospun form.

5. An antimicrobial structure, comprising:

the antibacterial layers are stacked, wherein each antibacterial layer is formed by high polymer fibers with antibacterial metal; and

at least one intermediate layer disposed between the plurality of antibacterial layers.

6. The antimicrobial structure of claim 5, wherein said antimicrobial metal-loaded polymeric fiber comprises a polymeric core and an antimicrobial metal outer sheath surrounding said polymeric core.

7. The antimicrobial structure of claim 6, wherein the polymeric core has an outer diameter of 1 nm to 10000 nm, and the polymeric core is made of high crystallinity polyethylene terephthalate, low softening temperature polymethyl methacrylate, or low softening temperature polystyrene.

8. The antimicrobial structure of claim 6, wherein the antimicrobial metal sheath has a thickness of 1 nm to 10000 nm, and the antimicrobial metal sheath is made of silver, copper, zinc or an alloy thereof.

9. The structure of claim 5, wherein one of the plurality of antimicrobial layers has at least one antimicrobial region and a non-antimicrobial region, and the material of at least one of the antimicrobial regions is silver, copper, zinc or alloys thereof.

10. The structure of claim 5, wherein at least one of said intermediate layers is formed of an organic polymer fiber made of an acrylic, vinyl, polyester or polyamide polymer.

11. The structure of claim 5, wherein at least one of said intermediate layers is a plastic layer made of an acrylic, vinyl, polyester or polyamide polymer.

12. The antimicrobial structure of claim 5, further comprising a carrier for carrying a plurality of the antimicrobial layers and at least one of the intermediate layers.

13. The antimicrobial structure of claim 5, wherein the antimicrobial layer has a thickness of 0.1 to 100 microns and the intermediate layer has a thickness of 0.1 to 100 microns.

14. An antimicrobial structure, comprising:

the antibacterial layers are stacked, wherein each antibacterial layer is formed by antibacterial metal fibers; and

at least one intermediate layer disposed between the plurality of antibacterial layers.

15. The antimicrobial structure of claim 14, wherein the antimicrobial metal fibers are made of silver, copper, zinc or alloys thereof.

16. The antimicrobial structure of claim 14, wherein the antimicrobial metal fibers have an outer diameter of 1 nm to 10000 nm.

17. The structure of claim 14, wherein at least one of said intermediate layers is formed of an organic polymer fiber made of an acrylic, vinyl, polyester or polyamide polymer.

18. The structure of claim 14, wherein at least one of said intermediate layers is a plastic layer, and said plastic layer is made of an acrylic, vinyl, polyester, or polyamide polymer.

19. The antimicrobial structure of claim 14, further comprising a carrier for carrying a plurality of the antimicrobial layers and at least one of the intermediate layers.

Technical Field

The present invention relates to an antibacterial structure, and more particularly to an antibacterial structure based on polymer fibers and a method for manufacturing the same.

Background

In daily life, people inevitably come into contact with various microorganisms such as bacteria, fungi and the like, wherein some harmful microorganisms can rapidly grow and reproduce under proper environmental conditions and can cause diseases and harm human health, and various articles for daily use are often important vectors for the reproduction and transmission of the harmful microorganisms. Along with the improvement of living standard of people, health consciousness and sanitary antibacterial consciousness of people are stronger and stronger, and in recent years, the antibacterial material is gradually applied to daily necessities to reduce the breeding of bacteria.

At present, two types of commonly used antibacterial materials are a metal antibacterial material and a photocatalytic antibacterial material. The common metal antibacterial materials comprise copper, zinc and silver, and the main antibacterial mechanism is that metal ions with antibacterial capacity can be released, once the metal ions contact the microbial cell membrane, the metal ions can be firmly adsorbed with microbes with negative charges by means of coulomb force and penetrate through the cell membrane to react with sulfydryl on proteins in the microbial body; as a result, the protein is inactivated, and the cell loses its ability to divide and proliferate, and then dies. The common photocatalytic antibacterial materials comprise titanium dioxide and zinc oxide, and the main antibacterial mechanism is that hydroxyl radicals with extremely strong oxidation effects can be generated under the irradiation of sunlight and ultraviolet rays, and can damage microbial cell membranes, enable cytoplasm to run away and oxidize cell nuclei. Although the antibacterial material can play a role in sterilization, the antibacterial material still has room for improvement in application.

Disclosure of Invention

The present invention is directed to an antibacterial structure and a method for manufacturing the same, which can achieve light weight, structural strength, and antibacterial ability.

In order to solve the above technical problems, one of the technical solutions adopted by the present invention is: a method for manufacturing an antibacterial structure comprises (A) providing a composite polymer fiber, and forming the composite polymer fiber into a layered structure, wherein an effective amount of antibacterial metal precursors are uniformly distributed on the composite polymer fiber; reducing the effective amount of antibacterial metal precursor into antibacterial metal to form an antibacterial layer on the laminated structure; providing an organic polymer fiber on the antibacterial layer, and enabling the organic polymer fiber to form an intermediate layer; and (D) repeating the steps (A) and (B) or the steps (A) to (C).

In an embodiment of the present invention, the composite polymer fiber includes a core layer and a surface layer covering the core layer, and the effective amount of the antimicrobial metal precursor is uniformly distributed in the surface layer, wherein step (B) includes performing plasma treatment on the layered structure to form the composite polymer fiber in the layered structure into a polymer fiber with antimicrobial metal, wherein the polymer fiber with antimicrobial metal includes a polymer core and an antimicrobial metal sheath surrounding the polymer core.

In an embodiment of the present invention, the composite polymer fiber includes a core layer and a surface layer covering the core layer, and the effective amount of the antimicrobial metal precursor is uniformly distributed in the core layer and the surface layer, wherein the step (B) includes performing plasma treatment on the layered structure, so that the composite polymer fiber in the layered structure forms an antimicrobial metal fiber.

In an embodiment of the present invention, step (a) includes providing the composite polymer fiber in an electrospun manner, wherein step (C) includes providing the organic polymer fiber in an electrospun manner.

In order to solve the above technical problem, another technical solution adopted by the present invention is: an antibacterial structure comprises a plurality of antibacterial layers and at least one middle layer. The antibacterial layers are stacked, each antibacterial layer is formed by high polymer fibers with antibacterial metal, and at least one middle layer is arranged among the antibacterial layers.

In an embodiment of the present invention, the polymer fiber with the antibacterial metal includes a polymer core and an antibacterial metal sheath surrounding the polymer core.

In an embodiment of the present invention, the outer diameter of the polymer core is 1 nm to 10000 nm, and the material of the polymer core is high-crystallinity polyethylene terephthalate (PET), low-softening-temperature polymethyl methacrylate (PMMA), or low-softening-temperature Polystyrene (PS).

In an embodiment of the present invention, the thickness of the antimicrobial metal sheath is 1 nm to 10000 nm, and the material of the antimicrobial metal sheath is silver, copper, zinc or an alloy thereof.

In an embodiment of the present invention, one of the antibacterial layers has at least one antibacterial region and a non-antibacterial region, and the material of the at least one antibacterial region is silver, copper, zinc or an alloy thereof.

In an embodiment of the invention, at least one of the intermediate layers is formed by an organic polymer fiber, and the material of the organic polymer fiber is acrylic, vinyl, polyester or polyamide polymer.

In an embodiment of the invention, at least one of the intermediate layers is a plastic layer, and the material of the plastic layer is acrylic, vinyl, polyester or polyamide polymer.

In an embodiment of the invention, the antibacterial structure further includes a carrier for carrying the plurality of antibacterial layers and at least one intermediate layer.

In an embodiment of the present invention, the thickness of the antibacterial layer is 0.1 to 100 micrometers, and the thickness of the middle layer is 0.1 to 100 micrometers.

In order to solve the above technical problem, another technical solution adopted by the present invention is: an antibacterial structure comprises a plurality of antibacterial layers and at least one middle layer. The antibacterial layers are stacked, each antibacterial layer is formed by one antibacterial metal fiber, and at least one middle layer is arranged among the antibacterial layers.

In an embodiment of the present invention, the material of the antibacterial metal fiber is silver, copper, zinc or an alloy thereof.

In an embodiment of the present invention, the outer diameter of the antibacterial metal fiber is 1 nm to 10000 nm.

In an embodiment of the invention, at least one of the intermediate layers is formed by an organic polymer fiber, and the material of the organic polymer fiber is acrylic, vinyl, polyester or polyamide polymer.

In an embodiment of the invention, at least one of the intermediate layers is a plastic layer, and the material of the plastic layer is acrylic, vinyl, polyester or polyamide polymer.

In an embodiment of the invention, the antibacterial structure further includes a carrier for carrying the plurality of antibacterial layers and at least one intermediate layer.

One of the benefits of the present invention is that the antibacterial structure provided by the present invention can provide a long-lasting and stable antibacterial effect and reduce the cost by using the technical scheme that "at least one intermediate layer is disposed between a plurality of antibacterial layers, wherein each antibacterial layer is formed by a polymer fiber with antibacterial metal" and "at least one intermediate layer is disposed between a plurality of antibacterial layers, wherein each antibacterial layer is formed by an antibacterial metal fiber".

For a better understanding of the features and technical content of the present invention, reference should be made to the following detailed description of the invention and accompanying drawings, which are provided for purposes of illustration and description only and are not intended to limit the invention.

Drawings

Fig. 1 is a schematic structural view of one of the antibacterial structures according to the first and second embodiments of the present invention.

Fig. 2 is an enlarged schematic view of part II of fig. 1.

Fig. 3 is an enlarged schematic view of a portion III of fig. 1.

Fig. 4 is a partial structural view of the polymer fiber with the antibacterial metal shown in fig. 2.

Fig. 5 is another structural view of the antibiotic structure in the first and second embodiments of the present invention.

Fig. 6 is a schematic view showing one of manufacturing processes of the antibiotic layer in the antibiotic structures according to the first and second embodiments of the present invention.

Fig. 7 is a schematic view of a partial structure of the composite polymer fiber shown in fig. 6.

Fig. 8 is a schematic view illustrating another manufacturing process of the antibiotic layer in the antibiotic structures according to the first and second embodiments of the present invention.

Fig. 9 is a schematic view showing a process of manufacturing an intermediate layer in the antibacterial structure according to the first and second embodiments of the present invention.

Fig. 10 is a schematic diagram of one specific application of the antibacterial structure according to the first and second embodiments of the present invention.

Fig. 11 is a schematic diagram of one specific application of the antibacterial structure according to the first and second embodiments of the present invention.

Fig. 12 is an enlarged schematic view of the XII portion of fig. 1.

Fig. 13 is another partial structural view of the composite polymer fiber shown in fig. 6.

Fig. 14 is a schematic structural view of an antibacterial structure according to a third embodiment of the present invention.

Fig. 15 is a schematic view illustrating a manufacturing process of an antibiotic layer in an antibiotic structure according to a third embodiment of the present invention.

Detailed Description

In recent years, with the change of life style and the high density of living environment, many harmful microorganisms such as bacteria, mold and the like exist in living space of people, and especially the harmful microorganisms are easy to propagate under the high-temperature and high-humidity climate condition of China; therefore, more and more living goods are required to have antibacterial ability to reduce the propagation and propagation of harmful microorganisms, thereby maintaining human health. Accordingly, the present invention provides an antibacterial structure which can be applied to various antibacterial products and provides a long-lasting and stable antibacterial effect. Examples of the antibacterial products include filters used in household electric appliances, clothes or cloth products having an antibacterial function, and window products for ventilation doors.

The following is a description of the embodiments of the present disclosure relating to the "antibacterial structure and the manufacturing method thereof" with specific embodiments, and those skilled in the art can understand the advantages and effects of the present disclosure from the disclosure of the present disclosure. The invention is capable of other and different embodiments and its several details are capable of modification and various other changes, which can be made in various details within the specification and without departing from the spirit and scope of the invention. The drawings of the present invention are for illustrative purposes only and are not intended to be drawn to scale. The following embodiments will further explain the related art of the present invention in detail, but the disclosure is not intended to limit the scope of the present invention.

It will be understood that, although the terms "first," "second," "third," etc. may be used herein to describe various components or signals, these components or signals should not be limited by these terms. These terms are used primarily to distinguish one element from another element or from one signal to another signal. In addition, the term "or" as used herein should be taken to include any one or combination of more of the associated listed items as the case may be.

First embodiment

Referring to fig. 1, a first embodiment of the present invention provides an antibacterial structure 1, which mainly includes a plurality of antibacterial layers 11 and at least one intermediate layer 12, wherein the plurality of antibacterial layers 11 are stacked, and the at least one intermediate layer 12 is disposed between the plurality of antibacterial layers. Thereby, the flow rate of the liquid is increased.

Although three antibacterial layers 11 and two intermediate layers 12 are shown in fig. 1, and each intermediate layer 12 is located between two adjacent antibacterial layers 11, the number and positions of the antibacterial layers 11 and the intermediate layers 12 are not particularly limited and may be set according to actual needs. In the present embodiment, the thickness of the antibiotic layer 11 may be 0.1 to 100 micrometers, and the thickness of the intermediate layer 12 may be 0.1 to 100 micrometers, but is not limited thereto.

Referring to fig. 2 and fig. 4, the antibacterial layer 11 is formed by polymer fibers 111 with antibacterial metal, for example, the antibacterial layer 11 may be formed by tightly stacking, winding or interweaving one or more polymer fibers 111 with antibacterial metal in a specific direction. Further, the polymer fiber 111 with the antibacterial metal comprises a polymer core C and an antibacterial metal sheath S surrounding the polymer core C, wherein the polymer core C has good mechanical strength and can play a supporting role, and the antibacterial metal sheath S has a high surface area and can be fully contacted with harmful microorganisms in the air. The outer diameter of the polymer core C may be 1 nm to 10000 nm, and the thickness of the antibacterial metal sheath S may be 1 nm to 10000 nm, but is not limited thereto. Although the antimicrobial metal is shown in fig. 4 as being in the form of a tubular sheath, in other embodiments, the antimicrobial metal may be continuously distributed on the surface of the polymeric core C in the form of microparticles.

In this embodiment, the material of the polymer core C may be acrylic, vinyl, polyester, polyamide, or a copolymer thereof. Examples of the acrylic polymer include polymethyl methacrylate (PMMA) and Polyacrylonitrile (PAN); examples of the vinyl polymer include Polystyrene (PS) and polyvinyl acetate (PVAc); examples of the polyester-based polymer include Polycarbonate (PC), polyethylene terephthalate (PET) and polybutylene terephthalate (PBT); the polyamide-based polymer may be nylon (nylon). However, the present invention is not limited to the above-mentioned examples. The material of the polymer core C is preferably high-crystallinity polyethylene terephthalate (PET), low-softening-temperature polymethyl methacrylate (PMMA), or low-softening-temperature Polystyrene (PS) in view of mechanical properties and processability. In addition, the material of the antimicrobial metal sheath S may be silver, copper, zinc, or an alloy thereof, but is not limited thereto.

Referring to fig. 3, in the present embodiment, the intermediate layer 12 may be formed of organic polymer fibers 121, for example, the intermediate layer 12 may be formed by tightly stacking, winding or interweaving one or more organic polymer fibers 121 in a specific direction. The outer diameter of the organic polymer fiber 121 may be 1 nm to 10000 nm; the material of the organic polymer fiber 121 may be acrylic, vinyl, polyester, polyamide polymer, or copolymer thereof, and specific examples of these polymers are described above and will not be described herein again. The intermediate layer 12 may also be a plastic layer; the material of the plastic layer can be acrylic, vinyl, polyester, polyamide polymers, or copolymers thereof, and specific examples of these polymers are described above and will not be described herein.

Referring to fig. 5, the antibacterial structure 1 may further include a carrier 13 for carrying the antibacterial layer 11 and the middle layer 12, and the antibacterial structure 1 may be applied to various antibacterial products through the carrier 13. In this embodiment, the carrier 13 may be a fixed frame, but is not limited thereto; the antibiotic layer 11 together with the intermediate layer 12 may be first processed to a predetermined size to be fixed on the carrier 13 and then mounted to a desired position through the carrier 13.

Referring to fig. 6 to 9, a method of forming the antibiotic structure 1 will be described. Firstly, providing a composite polymer fiber 111a, and forming the composite polymer fiber 111a into a layered structure 11a, wherein the composite polymer fiber 111a includes a core layer 1111a and a surface layer 1112a covering the core layer 1111 a; it is noted that the antimicrobial metal precursor MP is continuously and uniformly distributed in the surface layer 1112a along the axial direction (as shown in fig. 7). In the present embodiment, as shown in fig. 6, an electrospinning (electrospinning) apparatus 2 may be used to provide composite polymer fibers 111 a; the electrostatic spinning device 2 may include a first spinneret 21, a high voltage power source 22 and a collecting plate 23; the first spinning device 21 may include a first reservoir 211 and a first nozzle 212, the first nozzle 212 is communicated with the bottom of the first reservoir 211, and the positive pole and the negative pole of the high voltage power supply 22 are electrically connected to the first nozzle 212 and the collecting plate 23, respectively.

Further, a first electrospinning liquid L1 mainly comprising organic polymer, antimicrobial metal precursor and organic solvent is prepared, the first electrospinning liquid L1 is placed in the first reservoir 211 of the first spinneret 21, and then an electric field with a predetermined intensity is generated between the first spinneret 21 and the collecting plate 23 by the high voltage power supply 22, so that the first electrospinning liquid L1 is sprayed out from the first nozzle 212 to form the composite polymer fibers 111a deposited on the collecting plate 23. it should be noted that, if the antimicrobial structure 1 has the carrier 13, the carrier 13 can be placed on the collecting plate 23 before the composite polymer fibers 111a are provided.

Although fig. 7 shows that the composite polymer fibers 111a are formed by electrospinning, in other embodiments, the composite polymer fibers 111a may be formed by other methods, such as flash spinning (flash spinning), electro spraying (electrospraying), melt blowing (melt blowing), and electrostatic melt blowing (electrostatic melt blowing).

In this embodiment, the organic polymer is the same as the material of the polymer core C. The antimicrobial metal precursor MP is a precursor of the metal component of the antimicrobial metal sheath S, and may be a metal salt, a metal halide, or a metal organic complex, but is not limited thereto. The organic solvent may be methanol or butanone, but is not limited thereto. If the metal component is gold, gold precursors include gold trichloride and tetrachloroauric acid; if the metal component is silver, the precursor of silver can be silver trifluoroacetate, silver acetate, silver nitrate, silver chloride and silver iodide; if the metal component is copper, copper precursors include copper acetate, copper hydroxide, copper nitrate, copper sulfate, copper chloride, and copper phthalocyanine; if the metal component is platinum, the platinum precursor may be sodium hexahydroxyplatinate. However, the present invention is not limited to the above-mentioned examples.

After the layered structure 11a based on the composite polymer fiber 111a is formed, the antimicrobial metal precursor MP on the composite polymer fiber 111a is reduced to the antimicrobial metal so that the layered structure 11a forms the antimicrobial layer 11. In the present embodiment, as shown in fig. 8, the plasma processing apparatus 3 may be used to reduce the antimicrobial metal precursor MP on the composite polymer fiber 111a, so that the composite polymer fiber 111a forms a polymer fiber with antimicrobial metal. Further, the plasma processing apparatus 3 may perform a low pressure, high pressure or atmospheric plasma processing; the plasma treatment time may be 1 second to 300 seconds; the plasma treatment may be performed using an inert gas, air, oxygen or hydrogen plasma, and may be performed in an inert gas atmosphere (e.g., argon atmosphere), a nitrogen atmosphere, or a reducing atmosphere, such as hydrogen and nitrogen or an inert gas (e.g., argon), wherein the hydrogen content may be 2% to 8%, preferably 5%. However, the operation conditions of the plasma treatment can be adjusted according to actual requirements, and are not intended to limit the present invention. In the plasma treatment process, as the antibacterial metal generated by reduction gradually accumulates on the outer surface of the polymer core C to form a continuous antibacterial metal sheath S, the polymer core C will not be impacted by the plasma.

Although fig. 8 shows that the antimicrobial metal precursor MP on the composite polymer fiber 111a is reduced during the plasma treatment, in other embodiments, the antimicrobial metal precursor MP can be reduced by other methods, such as reducing the metal precursor with a strong base, such as sodium hydroxide.

After the antibacterial layer 11 is formed, an organic polymer fiber 121 is provided on the antibacterial layer 11, and the organic polymer fiber 121 forms an intermediate layer 12. In the present embodiment, as shown in fig. 9, the organic polymer fiber 121 may be provided using the electrospinning device 2; the electrostatic spinning apparatus 2 may further include a second spinning nozzle 24, and the second spinning nozzle 24 may include a second reservoir 241 and a second nozzle 242, wherein the second nozzle 242 is also electrically connected to the positive electrode of the high voltage power supply 22.

Further, a second electrospinning solution L2 mainly comprising organic polymer and organic solvent is prepared, the second electrospinning solution L2 is placed in a second reservoir 241 of the second spinneret 24, and then an electric field with a predetermined intensity is generated between the second spinneret 24 and the collecting plate 23 by the high voltage power supply 22, so that the second electrospinning solution L2 is sprayed out from the second nozzle 242 to form the organic polymer fibers 121 to be deposited on the antibacterial layer 11.

Although fig. 9 shows that the organic polymer fibers 121 are formed by electrospinning, in other embodiments, the organic polymer fibers 121 may be formed by other methods, such as flash spinning, electro-spraying, melt-blowing, and electrostatic melt-blowing.

It should be noted that the step of forming the antibacterial layer 11 can be repeated more than once according to the heat conduction requirement; when a plurality of antibacterial layers 11 are required, the aforementioned step of forming the intermediate layer 12 may be repeated more than once.

Referring to fig. 10 and 11, the practical application of the present invention will be further described. As shown in fig. 10, the air purifier a may include at least one antibacterial structure 1, and the air purifier a may be driven by any suitable means (e.g., a fan) to promote the airflow F to enter the interior thereof and to be discharged to the exterior after being in sufficient contact with the antibacterial structure 1, so as to achieve the purpose of purifying the air. In addition, as shown in fig. 11, the screen W may also include at least one antibacterial structure 1, and when outdoor air is exchanged with indoor air through the screen W, the antibacterial structure 1 may sterilize the air.

Second embodiment

Referring to fig. 1 and fig. 12, a second embodiment of the present invention provides an antibacterial structure 1, which mainly includes a plurality of antibacterial layers 11 and at least one intermediate layer 12, wherein the plurality of antibacterial layers 11 are stacked, and the at least one intermediate layer 12 is disposed between the plurality of antibacterial layers. The main difference between this embodiment and the first embodiment is: the antibacterial layer 11 is formed by antibacterial metal fibers 112, for example, the antibacterial layer 11 may be formed by tightly stacking, winding or interweaving one or more antibacterial metal fibers 112 in a specific direction. The outer diameter of the antibacterial metal fiber 112 is 1 nm to 10000 nm, and the material of the antibacterial metal fiber 112 may be gold, silver, copper, platinum, or an alloy thereof, but is not limited thereto.

Referring to fig. 6 and 7 in conjunction with fig. 13, in the present embodiment, a method for forming the antibacterial layer 11 includes providing a composite polymer fiber 111a, and forming the composite polymer fiber 111a into a layered structure 11a, wherein the composite polymer fiber 111a has a core layer 1111a and a surface layer 1112a covering the core layer 1111 a; it is noted that the core layer 1111a and the surface layer 1112a both have the antimicrobial metal precursor MP continuously and uniformly distributed along the axial direction (as shown in fig. 13), and the antimicrobial metal precursor MP is the same as the material of the antimicrobial metal fiber 112. Then, the antimicrobial metal precursor MP on the composite polymer fiber 111a is reduced to antimicrobial metal, so that the composite polymer fiber 111a forms the antimicrobial metal fiber 112, that is, the layered structure 11a forms the antimicrobial layer 11. For details of the technique for providing the composite polymer fiber 111a and reducing the antimicrobial metal precursor MP thereon, reference may be made to the description of the first embodiment, and further description is omitted here.

Third embodiment

Referring to fig. 14 and 15, a third embodiment of the present invention provides an antibacterial structure 1, which mainly includes a plurality of antibacterial layers 11 and at least one intermediate layer 12, wherein the plurality of antibacterial layers 11 are stacked, and the at least one intermediate layer 12 is disposed between the plurality of antibacterial layers. The main difference between this embodiment and the previous embodiment is: the at least one antibacterial layer 11 has at least one antibacterial region R1 and a non-antibacterial region R2 to suit special application.

In this embodiment, as shown in fig. 15, the antibacterial layer 11 is formed by first providing a composite polymer fiber 111a, and forming a laminated structure 11a by using the composite polymer fiber 111 a; forming a patterned mask M on the layered structure 11a to expose a predetermined portion of the layered structure 11 a; then, performing plasma treatment on the predetermined portion of the layered structure 11a through the patterned mask M to reduce the antimicrobial metal precursor MP on the composite polymer fiber 111a in the predetermined portion to form an antimicrobial region R1; the remaining portion of the layered structure 11a that has not undergone the plasma treatment forms a non-antibacterial region R2.

Although fig. 14 shows that the uppermost antibacterial layer 11 has an antibacterial region R1 and a non-antibacterial region R2, in other embodiments, antibacterial layers 11 at other positions may have an antibacterial region R1 and a non-antibacterial region R2.